Improvement in sash-holders



lmprovern'en Sash ,Holdersi Praented )une 1-3, 18.71.

No. H5322,

UNITED 'r'r DAVID N. B. COFFIN, JR., 0F NEWTON, MASSACHUSETTS.

lMPRCVEMENT IN SASH-HOLDERS.

Specification forming part of Letters Patent No. 115,822, dated Junel13, 1871.

Nature and Objects of the Intention.

Description of the Accompanying Drawing.

Figure l is a front elevation, showing parts of the window-sash andfastening. Fig. 2 is a perspective view of a part of the windowsash,prepared with suitable mortise and hole for the screw, ready to receivethe fastening. Fig. 3 is an elevation of the sash, showing an edge viewof sash and fastening, excepty that the friction-plate c is removed toshow the spring b, nut c, and socket d. Fig. 4 is a view from beneath ofthe sash, its guiding-groove or frame d, and the fastening. Fig. 5 showsone of the various kinds of springs which may be used, viz., acoiled-wire spring of metal.v

Fig. 6 shows a rubber or other gum spring. Fig. 7 shows theadjusting-screw, the lower end of which is tted to receive and beoperated by a key. Fig. 8 shows the metallic socket d, which receivesthe spring, and guides the nut c, screw e, and friction-plate a.. Fig. 9shows the friction-plate a.

General Description.

A mortise is formed in the side or edge of the sash, as shown in Fig. 2,to receive the metallic socket d when the metallic socket is to be used;it, however, is not indispensable,

as, if the wood is hollowed to the same form,

it will answer the purpose. Into the socket d, oi' wood or metal, istted the ictionplate a, which has two friction-surfaces, one "to bear atf and one at g. (See Fig. 4.) vInto the socket, at one end, is placedthe nut c ot' screw e; in the remaining space is placed the spring l).

A hole is bored, as at h, (see Fig. 2,) large enough to receive a key atthe outer end and to receive screw efbetween that and the socket d. Thescrew is entered through this hole into the nut c, passing within thespring b.

vThe friction-plate a. is then adjusted to cover the parts, and, beingembraced between the end shoulders j of the socket, is placed, with thesash, in its groove, as shown at Fig. 4.'

The spring b, or its substitute, presses the tric tion a. against thesash-guide or groove at g, Fig. et, and with a less force, proportionedto the wearing-surface at f, as but a portion of the spring bears on thenarrower flange k of the friction-plate.

, When it is required to increase or diminish the friction of plate cinthe sashguiding groove, the screw is turned to the right or left, as theoccasion requires, so compressing or allowing the spring to coillengthwise, so increasing or diminishing its lateral pressure, andincreasing or diminishing its 4action on the frictionplate. The screw isoperated by raising the window, when necessary, and applying a key tothe end l fitted to receive a key. The key should be in the keeping ofthe conductor or otherlperson in charge of the car or vehicle to whichthe improvement is applied. The parts may be made of the materialsordinarily used in the art, such as iron, steel, (galvanized orotherwise,) brass, composition, Ste. Anut may be used at each end of thespring, if preferred, either with differential or right-and-left-handedscrew-threads, for compressing and relieving the spring. y

v.lo make the mortise in the sash of uniform shape, the socket-piece maybe cast with the wings on, as shown atm in dotted lines in Fig. 8; orthese may be left oft' and the wood cut away, only, as shown at the leftof Fig. 2, the opposite side of the socket-piece at each end being takenoff, as indicated by dotted lines at n, Fig. 8, so making the niortiseof nniform shape and more easily made.

Any spring which, by the longitudinal screw and its nut, may besubjected to more or less tension laterally, or may be made to exertmore or less pressure laterally against the frictionplate, may be usedas a substitute for the rubber or'gum spring b. Also, gains may be cut2.' The arrangement of the accessible part er head of the adjustingscrewof a frctional sash 01' Window supporter Within or beneath. the

' lower rail.

s DAVID N. B; COFFIN, JR.

at both ends of the mortise, and the metallic socket furnished withtongues to t, as indcated iu dotted lines in Figs. 2 and 8.

I claim'- 1. The combination of the laterally-acting spring andfriction-plate with the adjusting` l Witnesses: screw and sash-guidinggroove, substantially as described.

LYsANDER BURNETT, O. E. HoDsDON.

